Jeiswold



` UNTE STATES MARTIN .lenIlsVwoLDy onwATERTowN, l CONNECTICUT.`

` "l ARRANQMENT oERoLLERs FORMAKING METAL TUBES.

` j spcie'afiof nettrsratent No. 12,739, dated `April 17, 1855.

" .WTO @Zhu/1,0m, t mag/concern. v

\ "Be' it known that 1I, MARTIN B. GRIswoLD,

"Metal `Tubes `and .for l/orking other Masses @of Metalzfina; Cylindrical Form; and I do l `hereby declarethatthe following is a full, clear, and exact description of lthe construc- .tion and loperation" ofthe same, reference i chine. Figs. 2, 8,

20. ,creasingdiameterof the material while being wroughtq Each rolleri is let .into a Vcase A, A, andtheirrelative position shown` in Fig. 2, one case beinghsuspended `over the being had to lthe annexed drawings, making a part of this specification, in which- Figurel is afperspective View ofthe ma- `of said machine; r

i Fig. 4 representsthe` contour of a tapering 'serrated roller, offwhich there are two u in the machine B, B, "having the points of the` projections rounded ofi", the roller decreasing in diameter to conform tothe deother, with the representation of a tube T,

between the rollers B,B.` `A, perpendicular :plane drawn throughthe axis of each roller,

will `cross at the "point of contact with the tubeT. ".Bytrevolving the rollers in the same direction and with the same velocity, the tube T will be revolved on its own axis `in anopposite' direction, the tube being at f sa an equal angle fronreach roller `is drawn through between them, on a line `nearly parallel to: the axis of the rollers, and leaving. ,i a spiral indentation around the tube resem- `"bling `thethreadof a screw. The` serrated n :working face of therollers elongates and at` the same time gives acylindrical form tolthematerial wrought. Like results may `xbeobtained 'by having theworkingfface of` @the rollers cut spirally like the thread ofa screw, the axis of the tubeand rollers being upon the same plane, but the first described ..1 methods are preferable, as any desired pitch, coarseor neisfeasily obtained. i The less 1 the angle atzwhich the rollers cross each f other the more uniform their action on the l whole surface of tht-materials` wrought.

"The cases A, A, containing the rollers B, B,

y fare held firmlyiin their places intheframe,

Jbypivots through theircenters, securedfto ers to cross at any" desired angle. Rollers ande, are different parts` *moves with` it.

first described, for drawing and finishing ATENT oFrICE.

the materials in the later part of the process.f i

The cases, A, A, and rollers B, B, are placed 1n a sto-ut iron frame as seen in Fig. 1.

`Between them and secured to the frame is the guide plate (Fig. 3) having an opening screws, passing through puppet heads cast `on the guide plate. On the ends of each slide C, C, and contiguous to each other isa loose guide roller D, D. Projecting in front and rear' are two arms V, V, secured to each slide having their ends shaped like the letter V,

for the purpose of guiding and keeping the `material wrought in its proper place be- 'tweenthe rollersl B, B. -The working roller AB, above the guide plate approaches to, and

recedesfrom the lower roller B by means 'of screws E, E, as seen in Fig. 2, acting onthe movable boxes of the rollerB, in the upper case, thereby allowing any variety of sizes to be wroughtwith one pair of rollers.

On the top of the frame Fig. l and behind it is seen `a pulley Gr, on a shaft leading to Vthe pulley 1H, through the standard P. Said standard is'secured to the movable box for the bearing of the upper roller B, and moves up or down with it. The above said shaft is connected at` the middle by the universal joint I. The pulley II,connects by a gear .chain with the pulley on the end of the "upper roller B. The pulley G, connects in a like manner with a like pulley on the bot- `tom of the frame (not seen) and this with the shaft and universal joint, with the pulley K, said shaft passingthrough the support U, which is secured to the lower case A, and The 'pulley on the end of thejlower roller .B, is geared to the pulley K. Now any motion Vcommunicated to either shaft on the top or bottom of theframe will Vbe transmittedtotherollers B, B, by the gearing above described, the universal joints L, and I, admittingany desiredchange in the direction of the axis of the rollers B, B,

cases A, A, holding the rollers B, B, to the perpendicular shaft M. The upper gearv chain N passes through the frame and crosses. The bottom chain O passes to the whether in active operation or not; this change is effected by gearing connecting the bottom ease A, Without crossing. By turn ing the shaft M, with a lever an opposite movement is gixf-"en to the eases A, A, and of Course to the direction of the axis of the rollers B, B. After thus reversing them, the tube must some from the opposite side of the frame and end of the rollers, and a reversed spiral indentation like a, left hand ed screw is made on the tube by the rollers, although they revolve the same Way as before.

What I claim as of .my invention, and desire to secure by Letters Patent, is

The arrangement of the adjustable smooth or serrated rollers, whose axes cross each 15 other as herein set forth, With the guide plate, and slides, and guide rollers, for mak* ing seamless metal tubes as described.

MARTIN R. GRISWOLD 'Vitnesses:

MYRoN 7. NEIL, LEMAN W. CUTLER. 

